How to Edit column Value avoiding Foreign key Error - spring

Question

I have a Spring server with use JPA and H2 to store data.
A database table is created using this class:
#Entity
public class parametros {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private long id;
long idproject;
#ElementCollection(fetch=FetchType.EAGER)
List<String> answers = new ArrayList<String>();
public parametros(){
}
.../* gets and sets */
}
So, JPA and H2 creates automatically a database within a Table="parametros" and another Table="parametros_answers" like this:
Table = "parametros"
ID | IDPROJECT
1 | 3
2 | 6
Table="parametros_answers"
PARAMETROS_ID | ANSWERS
1 | Masculine
1 | Female
1 | Other
2 | Cocacola
2 | Pepsi
So, the system is creating a foreign key in the Table = "parametros_answer" .
Until this point all is OK. The problem comes when I try to EDIT a column value from Table = "parametros". The only way I know to change a column value is using UPDATE SET statement. So when I try to do:
UPDATE PARAMETROS SET IDPROJECT=10 WHERE IDPROJECT=3 this Error Appears:
Error "DELETE FROM PUBLIC.PARAMETROS WHERE ID=? AND IDPROJECT=? , cause: "org.h2.jdbc.JdbcSQLException: Referential integrity constraint violation: ""FK_NFSJ58KBBAYJ84HFJLOCV9JEQ: PUBLIC.PARAMETROS_ANSWERS FOREIGN KEY(PARAMETROS_ID) REFERENCES PUBLIC.PARAMETROS(ID) (1)""; SQL statement:
DELETE FROM PUBLIC.PARAMETROS WHERE ID=? AND EXTRA_CONF=? AND IDPROJECT=? AND MULTI_MAXIMUM=? AND MULTI_MINIMUM=? AND NOTE=? AND PERGUNTA=? AND TITLE=? AND TYPE=? [23503-187]"; SQL statement:

Answer 1

The exception says what is the problem: you are violating the referential integrity.
All 'parametros_answers' rows have to point to a 'parametros'. You cannot delete or update 'parametros' without deleting or updating the connections first from 'parametros_answers' in the same transaction.
Or remove the foreign key constraint.
Or use entitymanager which automatically deletes/updates these rows if you mark the collection accordingly: #Cascade(value={CascadeType.ALL})

Answer 2

So, I don't know if this solution is the best but is the only one that works for me. Maybe the #highstakes solution will work when the DataBase is empty but in my case is not.
Steps i followed:
1 - Copy the parametros_answers table (the one which has the foreig key) like this:
CREATE TABLE PARAMETROS_ANSWERS_AUX AS SELECT * FROM PARAMETROS_ANSWERS
2 - Delete the parametros_answers table:
DROP TABLE PARAMETROS_ANSWER
2 - After that, I can do the changes I need on parametros table:
UPDATE PARAMETROS SET IDPROJECT=10 WHERE IDPROJECT=3
3 - I create again the parametros_answers by copying that from the parametros_answers_aux table:
CREATE TABLE PARAMETROS_ANSWERS AS SELECT * FROM PARAMETROS_ANSWERS_AUX
4 - Finally I can delete the auxiliar table parametros_answers_aux:
DROP TABLE PARAMETROS_ANSWERS_AUX